﻿/*
 * This file is part of MonoStrategy.
 *
 * Copyright (C) 2010-2011 Christoph Husse
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as
 *  published by the Free Software Foundation, either version 3 of the
 *  License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Authors: 
 *      # Christoph Husse
 * 
 * Also checkout our homepage: http://monostrategy.codeplex.com/
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MonoStrategy
{
    internal class JobMarketCarrying : OneTimeJob
    {
        internal GenericResourceStack Query { get; private set; }
        internal Point CarryTo { get; private set; }
        internal MarketBuilding Market { get; private set; }

        internal JobMarketCarrying(MarketBuilding inMarket, Movable inMovable, GenericResourceStack inQuery, Point inCarryTo)
            : base(inMovable)
        {
            if ((inQuery == null) || (inMarket == null))
                throw new ArgumentNullException();

            Query = inQuery;
            CarryTo = inCarryTo;
            Market = inMarket;
        }

        internal override bool Prepare()
        {
            if (!base.Prepare())
                return false;

            AddAnimationStep(Query.Position.ToPoint(), null, (successProv) =>
            {
                if (!successProv)
                {
                    Movable.Stop();

                    RaiseCompletion(false);

                    return false;
                }

                // pick up resource
                Query.RemoveResource();
                Movable.Carrying = Query.Resource;

                return true;
            });

            AddAnimationStep(CarryTo, null, (successQuery) =>
            {
                // drop resource 
                successQuery &= !Query.IsRemoved;

                if (successQuery)
                {
                    Movable.Carrying = null;

                    // special marked drop, to prevent re-carrying 
                    Market.Parent.ResMgr.DropMarketResource(Market, CarryTo, Query.Resource, 1);
                }

                Movable.Stop();

                RaiseCompletion(successQuery);

                Movable.Job = null;

                return successQuery;
            });

            return true;
        }
    }
}
